<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<h1>我是原生HTML</h1>
<button onclick="changeText('咕咕咕')">改变标题</button>
<button onclick="openPhoto()">打开相册</button>
</body>

<script>
    function changeText(str){
        const h1 = document.querySelector('h1')
        h1.innerHTML = str
    }
    function openPhoto(){
        registerInfo.openPhoto()
    }
</script>
</html>